The scientist, Dr. Fiona Havers, told colleagues at the Centers for Disease Control and Prevention on Monday that she no longer had confidence that the COVID and RSV data would be used "objectively or evaluated with appropriate scientific rigor to make evidence-based vaccine policy decisions," according to an email seen by Reuters.

Lakshmi Panagiotakopoulos said she could no longer help vulnerable people after officials removed recommendations to immunize children and pregnant women.